Frithjof Schuon is best known as the foremost spokesman of the Perennial Philosophy and as a philosopher in the metaphysical current of Shankara and Plato. Schuon was born in 1907 in Basle, Switzerland, of German parents and died in the United States in 1998.

Harry Oldmeadow was Coordinator of Philosophy and Religious Studies at La Trobe University Bendigo, Australia, until his recent retirement. He is a prolific and well-respected author on the Perennialist school of comparative religion. He lives in Australia.